Final answer:
Allergic reactions can have varied symptoms including itching, wheezing, and swelling, with the most severe reaction being anaphylaxis, potentially causing a dangerous drop in blood pressure and airway obstruction.
Step-by-step explanation:
The symptoms of an allergic reaction can include a variety of responses, ranging from the mild to the very severe. Some common symptoms are tingling or itching in the mouth, hives, and wheezing. More severe reactions can include shortness of breath, swelling of the lips, face, tongue, and throat, and even anaphylaxis, which may result in a loss of consciousness. Anaphylaxis requires immediate emergency treatment and can include symptoms such as a dangerous drop in blood pressure, swelling of the tongue and throat, which could potentially block airways, and wheezing. People who have experienced anaphylactic reactions in the past might carry epinephrine autoinjectors (EpiPen®) for quick self-administration to control the immune response until they can receive medical care.